Primer for internal-combustion engines



PRIMER FOR INTERNAL COMBUSTION ENGINES Filed Jan. 16, 1922 WWII:

iii,

CHARLES S. BURTON, 0F OAK PARK, ILLINOIS.

PRIMER FOR INTERNAL-COMBUSTION ENGINES.

Application filed January 16, 1922. SeriaI No. 529,462.

To all whom it may concern:

Be it known that 1, CHARLES S. Bnn'ron, a citizen of the United States, residing in Uak Park, in the county'of Cook and State of 5 Illinois, have invented certain new and useliul Improvements in Primers for Internal- (lombustion Engines, of which the following is a specification, reference being had to the accompanying drawings, forming a part 0 thereof.

The purpose of this invention is to provide an improved construction of primer for an internal combustion engine which shallloe silnpler and more economical in manufacture than devices now in use. It consists in the elements and features of construction shown and described, as indicated in the claim.

In the drawings:

The figure is an axial section of a device 0 embodying this invention.

This device consists of a simple plunger pump comprising the barrel, 1, plunger piston, 2, having an operating stem, 3, to which a plunger head is connected yieldingly, a

' compressible spring, 4, reacting between the stem and the plunger head for holding the plunger head yieldingly extended for a purpose which shall hereafter appear. The intake which leads from the source of fuel supply-which may be the carbureter or vacuum tank or other IGSG1VOlI.",-iS controlled by a one-way seating valve which in the construction shown is a ball valve, 5, for which a widely tapering approach to its seat is provided as seen at 6. The outlet pas sage, 7, 8, comprises also a valve chamber, 9, intermediate the two parts, 7 and 8, in which there is the outwardly-opening check valve, 10. which is shown as a ball valve and provided with a light spring, 11, for insuring its normal seating. A. cross pin, 12, may be provided to prevent it from becoming seated in or obstructing the entrance to the portion, 8, oi? the outflow passage. It will be understood. that the outflow passage is connected to the manifold of the engine to be served.

The operation of the device, is that by the ret'acting stroke of the piston plunger the fuel is drawn in past the inlet check valve, 5, and by the forcing stroke the liquid is "forced on past the outlet valve to the manifold.

in devices which are commonly .in use, it has been judged necessary to provide a third valve which is seated between the inlet and outlet valves by the final movement of the piston in its forcing stroke, to prevent suc tion from the engine drawing fuel at all times through the priming device. in the present construction this third valve is rendered unnecessary by the positioning of the plunger with respect to the inlet valve so that the plunger locks said inlet valve on its seat at the limit of the stroke.

Avoidance of the danger of jamming the inlet valv on its seat in this forcing stroke which locks the valve, as stated, is the purpose of the yielding connection of the terminal of the plunger with the stem. The parts are designedly proportioned so that the forcing stroke of the plunger is stopped by the handle, 3, reaching the cap of the pump barrel before the limit of the play of the plunger terminal with respect to the stem is reached, so that the force with which the plunger terminal presses and holds the valve 5. to its seat, is limited by the tension which is given the spring by compressing it in the plunger stroke stopped, as indicated, by the handle reaching the gap.

I claim:

A primer for internal combustion engines consisting of a plunger pump having oneway seating valves at the intake and discharge, the plunger being positioned with respect to the intakevalve for locking said valve on its seat at the limit of the Forcing stroke of the plunger and having a terminal for encountering the valve which connected to the plunger for longitudinal play thereon; a spring reacting between the plunger stem and said terminal to thrust the latter yieldingly against the valve; and means For stopping the positive thrust of the plunger short oil" the limit of the play of th terminal. whereby the pressure oi the valve on its seat is limited to the tension of? the spring.

In testimony whereof. I have hereunto set my hand at Chicago, Illinois, this 12th day of January, 1922.

CHARLES S. BURTON. 

